1.

Series combination of 10Omegaresistance and 5 cm long solenoid having 5 mH self inductance are connected to 10 V battery. Current passing through solenoid in steady state is ___

Answer»

5A
`1A`
`2A`
zero

Solution :In the present case, we have the formula ,
`I=I_0 (1-e^(-Rt//L))`
`=I_0(1-1/e^(Rt//L))`
Theoretically , STEADY state is reached when `t to OO` . At this TIME `I to I_0`.
But `I_0=V/R=10/10`=1A


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